Agilent Technologies ENA Series Guia do Utilizador Página 150

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144 Chapter 4
Calibration
4-port TRL calibration
4-port TRL calibration
The 4-port TRL calibration function lets you measure calibration data by connecting thru,
reflection (open or short), line, or match calibration standards to (between) 4 test ports.
This calibration provides the most accurate measurement for non-coaxial parts, using 48
error terms in total for calibration in the same way as full 4-port calibration.
NOTE This function is available with firmware version A.06.00 or later. For firmware version
A.06.00 or earlier, you can use VBA macros to define/save calibration kits and execute
calibration. For more information, see Appendix A, “Manual Changes,” on page 587.
Before executing TRL calibration, you need to modify the calibration kit definition you use
(or create a new one). For more information, see “Changing the Calibration Kit Definition”
on page 181.
Figure 4-34 4-port TRL error model (options 413, 414)
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